Hi!
i have this problem...
i use the Gcx to switch between 3 different amps
but everytime it starts an annoying HUM...
i power up the three amps thru a furman power conditioner..
should i think about cutting any of the ground wire on the mains lead of two heads?
isn't that dangeorus?
thank you
Ground loop with multiple amps plugged
-
jgastineau
- Posts: 21
- Joined: Sat Mar 06, 2010 3:34 pm
Re: Ground loop with multiple amps plugged
I would try an Ebtech hum eliminator to isolate the amps. You could either get 2 of the 2 channel units or the rackmount 8 channel unit for about the same money. I would suggest inserting it right before the amp input. I find when you use one, you need to keep the amps grounded for the best results.
Jeff
Jeff
Re: Ground loop with multiple amps plugged
The ebtech WILL suck tone unless you get the humX.
In this situation, you need isolation transformers. I have 2 amps/preamps and would have dealt with this situation.
What I use is the lehle p-split II. I use it a little differently though, I do NOT use the split out only the transformer out. You'd have to put one on 2 of the 3 amps(between the gcx loop out and the head amp your using). gcx send -> p-split II input -> P-split transformer out -> amp input.
Basically my switcher a/b's my guitar signal between the amps....between the output of one loop into the head/preamp I put the lehle. It's a very good Isolation tranny...I like to think of it as an isolation transformer first, and a quality splitter second.
You NEVER want to unplug the gound on your power cable, it IS dangerous. Only for quick testing. Save yourself some time and get the p-split II.
In this situation, you need isolation transformers. I have 2 amps/preamps and would have dealt with this situation.
What I use is the lehle p-split II. I use it a little differently though, I do NOT use the split out only the transformer out. You'd have to put one on 2 of the 3 amps(between the gcx loop out and the head amp your using). gcx send -> p-split II input -> P-split transformer out -> amp input.
Basically my switcher a/b's my guitar signal between the amps....between the output of one loop into the head/preamp I put the lehle. It's a very good Isolation tranny...I like to think of it as an isolation transformer first, and a quality splitter second.
You NEVER want to unplug the gound on your power cable, it IS dangerous. Only for quick testing. Save yourself some time and get the p-split II.